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Keywords: Microstructure
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Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-059
... Abstract We present a combined study of a classical rock sample from Val Malenco, Italy, by investigating the microstructure and texture with state-of-the art synchrotron X-ray, neutron diffraction methods and measuring ultrasonic velocities both with a multianvil apparatus and a novel...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-008
... Abstract The present work focuses on the characterization of the geometry of the microstructure of porous oolitic rocks. These rocks are constituted by an assemblage of porous grains (oolites), pores and inter-granular crystals. X ray 3D Computed Tomography is used to identify the different...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-086
... microstructural parameters themselves: a type of matrix and minerals, dimensions, and distribution of mineral grains. Any preferred orientation of the microstructure provides anisotropy for mechanical properties of granites. Kataoka et al. [5] has conducted Semi-Circular Bend(SCB) tests using African granite...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-002
... approaches were successfully validated against laboratory test results in terms of fracture pattern and stress-strain relations and to a minor extend also against time-dependent damage evolution. 1 INTRODUCTION Micromechanical behavior of rocks is dependent on microstructure. Microstructure in turn is...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-114
... microstructural parameters, such as the shape, size and distribution of inherent microcracks and grains, and the type of matrix and minerals. If there is any preferred orientation of the microstructures, this leads to anisotropy of the mechanical properties of the rock itself (Schedl et al. 1986). In this paper...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-120
... Abstract A comprehensive 3D simulation research of the stress formation on the microstructure level of hard rocks due to microwave irradiation applied in microwave assisted rock breakage is presented. The specific aim of the present work is to investigate the influence of microstructural...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-116
... Abstract The mechanical behavior of rock under high-temperature was simulated using a grain-based distinct element model. The microstructure of rock was represented as an assembly of deformable polygonal grains, and the micro-parameters characterizing the deformability and strength of each...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-031
... Microstructure displacement field testing method Rock Engineering and Rock Mechanics: Structures in and on Rock Masses Alejano, Perucho, Olalla & Jiménez (Eds) © 2014 Taylor & Francis Group, London, 978-1-138-00149-7 Experimental evaluation of the fracture toughness on a limestone G. Suhett Helmer, J...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-068
... Abstract The paper deals with formulation and numerical implementation of anisotropic strength condition for micro layered rock. Periodically layered two–constituent microstructure is considered. The failure criterion of the constituents is assumed to be governed by Drucker-Prager strength...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-061
... Abstract By micromechanics of geocomposites, we understand an analysis of mechanical properties of modified geomaterials by numerical testing of digitalized samples with complicated microstructure but known local material properties. We touch several important and interacting topics–numerical...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2009, October 29–31, 2009
Paper Number: ISRM-EUROCK-2009-049
... pressuremeter tests in between rigid layers are recommended to detect any layer with an extremely weak cementation and high deformability. micro-ct image Reservoir Characterization carbonate sand microstructural degradation esem image Upstream Oil & Gas Netherlands microscope molenaar...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-046
... ABSTRACT: Rock and rock masses are composed of discrete elements of microstructures such as different grains and microcracks. In this study, first we show experimental results that a propagation, coalescence and increased density of microcracks cause mesoscale and macroscale cracks, and that...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 96, September 2–5, 1996
Paper Number: ISRM-EUROCK-1996-047
... ABSTRACT: This paper presents a critical analysis of three microstructural modellings, namely, the Double gradient theory the Cosserat theory, and the homogenization up to the third order. The basic assumptions for obtaining a macroscopic description of heterogeneous media are first reviewed...

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